Its already done in the pre-release version ( http://tiddlywiki.com/prerelease/plugins/tiddlywiki/katex/ <http://www.google.com/url?q=http%3A%2F%2Ftiddlywiki.com%2Fprerelease%2Fplugins%2Ftiddlywiki%2Fkatex%2F&sa=D&sntz=1&usg=AFQjCNFFfFiGjj8cIa4aghavm_CtW2aNyA> ) see:
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